embassies in libya, egypt and yemen rand protests elsewhere are threatening the state of security in the arab world. also hanging in the balance, much of the world's supply of oil. i just returned from bahrain and a stay on board the uss enterprise. we examine the security of the strait of hormuz and i got a first-hand look how the u.s. navy protects this important passageway for 20% of the world's oil. tonight my exclusive sit down with sheikh mubarak. bahrain is the regional home for the u.s. navy's fifth fleet. the small gulf country is grappling with its own citizens arab spring aspirations and there has been violence. the sheikh defends the family's crackdown on protesters. my rear interview with ted, slap shot carter. commander of the strike group twelt. he is on the uss enterprise and is in charge of making sure millions of barrels of oil get you there the straight every day despite threats from iran to close it down. we talk about what is takes to keep the commercial waterway flowing. and how cuts in washington could affect the navy's mission in the entire persian gulf region